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" glatten gitane getest twff MARTIN V; B. HOWE, OEGARDNER, MASSACHUSETTS, ASSIGNOR TO HET- WOOD, BROTHERS, AND COMPANY, OF SAME PLACE.

'Letters Patent No. 73,721, dated January 28, 1868.

IMPROVED TILTING CHAIR-SEAT.

TO ALL WIIOM IT MAY CONCERN:

Be it known that l', MARTIN VAN BUREN Hows, of Gardner, in the county of Worcester, and State ot Massachusetts, have invented an ImprovedTilting-Seat Chair, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification, in which- Figure 1 is a rear elevation of my improved chair.

Figure 2 is a vertical section on the line a: a: of fig. 1, the seat being tilted back.

Figure 3 is a vertical section on the line yy of iig. 2, with the seat in place.

Figure 4 detail to be referred to.

In tilting-seat chairs, as heretofore constructed, the seat has been connected by springs to a frame extending over the posts of the chair. My invention consists in directly connecting the rear of the seat of a chairto the rear posts or cross-bar extending over them, the ordinary frame under .the seat being dispensed with, thus reducing the -cost and simplifying the construction of the chair; the front of' the seat in its normal position simply resting upon the front posts or their cross-bar, and being free to swing or tilt up when the occupant moves bach* into an inclined position, the pressure backward occasioned thereby causing the seat to tilt or swine as required, a suitable stop being provided to prevent its being tipped down too far.

To enable others skilled in the art to understand and use my invention, I will proceed to describe the manner in which I have carried it out.

In the said drawings, A is the seat of a chair, the under side ef the front of which is provided with sockets and the wires serving as springs, by which construction, when the occupant assumes an inclined position, the upper ends oi these Wires o1' springs are bent or twisted over by his weight and the pressure of his hack, and the scat yields to conform thereto, and is tilted into the position seen in iig. 2. e is a bent arm or stop, screwed or otherwise secured at `)"to the cross-bar D, one end of the stop being attached to one of the front rounds ot' the chair, while its other cud is bent up, as shown in fig. 2, to prevent the seat from being tipped back too far. When the chair is vacated, or when the pressure on its back is relieved by the occupant sitting uprightlythe front of the seat is thrown by the recoil of the springs 6 into its original position, (see tig. 1,) the sockets a fitting snugly down upon and enclosing the tops of the posts B C, and preventing any lateral play of the seat Y thereon.

It is evident that the exact form of the springs and their points of connection with the seat and rear posts, or their cross-bar, may be varied without departing from the spirit of my invention. The seat may also be connected to the rear posts or to their cross-bar by ball-and-soclret Ljoints or hinges, but I prefer to use the springs, as above described.

By constructing a chair Without the auxiliary frame heretofore used under the seat, and attaching it by springs directly to the rear posts, or to the cross-bar over them, the chair is niuch lighter, more stylish in appearance, and can be furnished at a less cost.

` Claims. y I claim connecting the seat of a chair tothe rear posts E I", or their crossbar D, by means of springs substantially as and for the purpose set forth.d

I also claim the stop e, in combination with the above, substantially as and for the purpose specified. I also claim the springs b, constructed, applied, and operating substantially as and for the purpose set forth.

MARTIN V. B. IIOWE.V

Witnesses MARTHA W. Hnvwoon, EnANcrs RICHARDSON. 

